My sincere opinion is that all potential of the new stars JGS,MGY,KJW was seriously wasted. But somehow i get to see something of what i expected in the final episode so i was happy.M3 ended on good terms even though the past three episodes 13,14,15 disappointed me to hell.Apart from that regarding the "writer changing" issue the new writer was good with the 11,12 episodes but the person didn't know what to do with the pre-established characters and about how to put an end to the drama with ridiculous ideas like Mu gyul's kidnap,Mary falling off the cliff and then finally Mu Gyul getting pissed at Mary and Jung-In's hug for a complete episode(15).
To conclude, the writer would have been more creative with the story (i,e., with talented actors like these three,viewers would obviously have higher expectations from the drama).
THE END
